RosNode c++

该教程结合ROS的基础教程,展示如何创建功能更全的发布者和订阅者节点。发布者节点从启动文件或命令行利用参数服务器初始化变量,并通过动态重配置服务器在运行时修改变量。它使用自定义消息在主题上发布数据。订阅者节点则设置监听特定主题的自定义消息并打印数据。这些功能通过类的形式实现。

http://wiki.ros.org/ROSNodeTutorialC%2B%2B that 's the shit from the ros wiki 

let's check out thi shit!

Writing a Publisher/Subscriber with Dynamic Reconfigure and Parameter Server (C++)

This tutorial will show you how to combine several beginner level tutorials to create publisher and subscriber nodes that are more fully-featured than the previously created nodes. This page will describe how to create a publisher node that:

A subscriber node will be created to work with the publisher node that

  • Sets up a subscriber to listen for the custom message on the specified topic and prints out the message data.

The variables that are used, and the callback functions used by the publisher and subscriber, will be part of a class that is created for this purpose as described in this tutorial.

It is assumed that all of the   beginner tutorials  will have been completed before using this one.
// pretty obvious i have completed but i still don't understand the shit you are talking about. motherfucker


AND SHITS HAPPENS ANYTIME YOU MODIFY THE .BASHRC YOU NEED TO RESTART THE TEMINAL~!
fuck this motherfucker mechanism

ROS 2中使用C++进行编程是机器人开发中的重要部分,尤其适用于需要高性能和实时控制的应用场景。ROS 2提供了对C++11及以上版本的良好支持,并通过其客户端库`rclcpp`(ROS Client Library for C++)简化了节点的创建与通信。 ### 创建ROS 2 C++节点 在ROS 2中,使用C++创建一个节点通常涉及以下几个步骤: 1. **初始化ROS 2上下文**:通过`rclcpp::init`函数初始化ROS 2的上下文。 2. **创建节点类**:通常继承自`rclcpp::Node`类,并在构造函数中定义发布者、订阅者、服务或客户端等组件。 3. **运行节点**:使用`rclcpp::spin`函数启动节点的事件循环。 以下是一个简单的C++ ROS 2节点示例,该节点发布一个字符串消息到`/chatter`话题: ```cpp #include "rclcpp/rclcpp.hpp" #include "std_msgs/msg/string.hpp" using namespace std::chrono_literals; class MinimalPublisher : public rclcpp::Node { public: MinimalPublisher() : Node("minimal_publisher"), count_(0) { publisher_ = this->create_publisher<std_msgs::msg::String>("/chatter", 10); timer_ = this->create_wall_timer( std::chrono::seconds(1), [this]() { this->timer_callback(); }); } private: void timer_callback() { auto message = std_msgs::msg::String(); message.data = "Hello, world! " + std::to_string(count_++); publisher_->publish(message); } rclcpp::TimerBase::SharedPtr timer_; rclcpp::Publisher<std_msgs::msg::String>::SharedPtr publisher_; size_t count_; }; int main(int argc, char *argv[]) { rclcpp::init(argc, argv); rclcpp::spin(std::make_shared<MinimalPublisher>()); rclcpp::shutdown(); return 0; } ``` ### 构建系统配置 为了编译和链接ROS 2 C++代码,需要在`CMakeLists.txt`文件中添加适当的依赖项和编译指令。以下是一个典型的`CMakeLists.txt`配置片段: ```cmake cmake_minimum_required(VERSION 3.5) project(minimal_publisher) find_package(ament_cmake REQUIRED) find_package(rclcpp REQUIRED) find_package(std_msgs REQUIRED) add_executable(minimal_publisher src/minimal_publisher.cpp) target_link_libraries(minimal_publisher rclcpp::rclcpp std_msgs::std_msgs ) target_include_directories(minimal_publisher PRIVATE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include> $<INSTALL_INTERFACE:include> ) install(TARGETS minimal_publisher DESTINATION lib/${PROJECT_NAME}) ament_package() ``` ### 示例教程与资源 ROS 2官方提供了丰富的C++编程教程,涵盖了从基础节点创建到高级功能(如动作、服务、参数服务器等)的使用。可以通过[ROS 2官方文档](https://docs.ros.org/en/foxy/Tutorials.html)获取详细的C++编程指南和示例。 此外,ROS 2社区还提供了许多开源项目和示例代码,可以作为学习资源。例如,在GitHub上搜索“ROS 2 C++ examples”可以找到大量实际应用案例。 ---
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